/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Populates the passed array of PolygonIDs with the polygons connected to this vertex
template<typename Alloc> void GetVertexConnectedPolygons ( const [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID, [TArray](API\Runtime\Core\Containers\TArray)< [FPolygonID](API\Runtime\MeshDescription\FPolygonID), Alloc > & OutConnectedPolygonIDs ) const